FORTINET INC

Ticker: FTNT CUSIP: 34959E109 Class: COM

GAMCO INVESTORS, INC. ET AL's Holding History (CIK: 0000807249)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 105,920 Value ($000) $8,411 Avg Close $82.94 Range $75.31 - $87.66

Q3 2025

Shares 107,320 Value ($000) $9,023 Avg Close $89.23 Range $70.12 - $108.77

Q2 2025

Shares 108,120 Value ($000) $11,430 Avg Close $100.89 Range $81.70 - $109.33

Q1 2025

Shares 109,920 Value ($000) $10,581 Avg Close $101.38 Range $90.80 - $114.82

Q4 2024

Shares 109,920 Value ($000) $10,385 Avg Close $88.94 Range $76.00 - $100.59

Q3 2024

Shares 109,920 Value ($000) $8,524 Avg Close $68.31 Range $54.57 - $78.18

Q2 2024

Shares 106,920 Value ($000) $6,444 Avg Close $62.18 Range $57.00 - $73.63

Q1 2024

Shares 108,540 Value ($000) $7,414 Avg Close $66.57 Range $56.94 - $73.91

Q4 2023

Shares 116,240 Value ($000) $6,804 Avg Close $55.27 Range $44.12 - $60.60

Q3 2023

Shares 119,000 Value ($000) $6,983 Avg Close $66.20 Range $56.10 - $81.24

Q2 2023

Shares 119,500 Value ($000) $9,033 Avg Close $68.00 Range $60.33 - $76.27

Q1 2023

Shares 119,500 Value ($000) $7,942 Avg Close $56.85 Range $45.88 - $66.57

Q4 2022

Shares 119,500 Value ($000) $5,842 Avg Close $52.11 Range $42.61 - $58.29

Q2 2022

Shares 120,000 Value ($000) $6,790 Avg Close $59.39 Range $48.73 - $71.52

Q1 2022

Shares 24,000 Value ($000) $8,202 Avg Close $62.17 Range $52.57 - $72.42

Q4 2021

Shares 26,500 Value ($000) $9,524 Avg Close $65.81 Range $56.95 - $74.35

Q3 2021

Shares 26,500 Value ($000) $7,739 Avg Close $57.90 Range $47.27 - $64.40

Q2 2021

Shares 26,500 Value ($000) $6,312 Avg Close $42.69 Range $37.09 - $49.47

Q1 2021

Shares 26,900 Value ($000) $4,961 Avg Close $32.72 Range $27.46 - $38.77

Q4 2020

Shares 27,400 Value ($000) $4,070 Avg Close $25.28 Range $21.35 - $30.67

Q2 2020

Shares 29,000 Value ($000) $3,981 Avg Close $25.11 Range $19.20 - $29.94

Q1 2020

Shares 29,000 Value ($000) $2,934 Avg Close $21.43 Range $14.04 - $24.36

Q4 2019

Shares 28,800 Value ($000) $3,075 Avg Close $18.82 Range $14.91 - $22.06

Q2 2019

Shares 41,300 Value ($000) $3,173 Avg Close $16.47 Range $13.77 - $19.39

Q1 2019

Shares 41,870 Value ($000) $3,516 Avg Close $15.94 Range $13.01 - $17.72

Q4 2018

Shares 42,870 Value ($000) $3,019 Avg Close $15.23 Range $12.88 - $18.87

Q2 2018

Shares 44,400 Value ($000) $2,772 Avg Close $11.84 Range $10.41 - $13.26

Q1 2018

Shares 44,700 Value ($000) $2,395 Avg Close $9.74 Range $8.70 - $11.07

Q4 2017

Shares 51,700 Value ($000) $2,259 Avg Close $8.15 Range $7.18 - $9.13

Q3 2017

Shares 52,000 Value ($000) $1,864 Avg Close $7.59 Range $7.09 - $8.31

Q2 2017

Shares 52,000 Value ($000) $1,947 Avg Close $7.75 Range $7.15 - $8.27

Q4 2016

Shares 51,900 Value ($000) $1,563 Avg Close $6.25 Range $5.70 - $7.50

Q3 2016

Shares 74,600 Value ($000) $2,755 Avg Close $6.99 Range $6.18 - $7.46

Q2 2016

Shares 75,600 Value ($000) $2,388 Avg Close $6.48 Range $5.62 - $6.99

Q1 2016

Shares 75,600 Value ($000) $2,316 Avg Close $5.52 Range $4.63 - $6.20

Q4 2015

Shares 74,800 Value ($000) $2,332 Avg Close $7.18 Range $5.97 - $8.93

Q3 2015

Shares 72,300 Value ($000) $3,071 Avg Close $8.85 Range $7.00 - $10.06

Q2 2015

Shares 76,400 Value ($000) $3,158 Avg Close $7.77 Range $6.68 - $8.82

Q1 2015

Shares 84,100 Value ($000) $2,939 Avg Close $6.53 Range $5.71 - $7.14

Q4 2014

Shares 82,200 Value ($000) $2,520 Avg Close $5.39 Range $4.62 - $6.30

Q3 2014

Shares 82,200 Value ($000) $2,077 Avg Close $5.05 Range $4.61 - $5.37

Q2 2014

Shares 82,200 Value ($000) $2,066 Avg Close $4.48 Range $4.01 - $5.03

Q1 2014

Shares 45,000 Value ($000) $991 Avg Close $4.37 Range $3.79 - $4.79

Q4 2013

Shares 15,000 Value ($000) $287 Avg Close $3.90 Range $3.26 - $4.49

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	105,920	$8,411	$82.94	$75.31 - $87.66
Q3 2025	107,320	$9,023	$89.23	$70.12 - $108.77
Q2 2025	108,120	$11,430	$100.89	$81.70 - $109.33
Q1 2025	109,920	$10,581	$101.38	$90.80 - $114.82
Q4 2024	109,920	$10,385	$88.94	$76.00 - $100.59
Q3 2024	109,920	$8,524	$68.31	$54.57 - $78.18
Q2 2024	106,920	$6,444	$62.18	$57.00 - $73.63
Q1 2024	108,540	$7,414	$66.57	$56.94 - $73.91
Q4 2023	116,240	$6,804	$55.27	$44.12 - $60.60
Q3 2023	119,000	$6,983	$66.20	$56.10 - $81.24
Q2 2023	119,500	$9,033	$68.00	$60.33 - $76.27
Q1 2023	119,500	$7,942	$56.85	$45.88 - $66.57
Q4 2022	119,500	$5,842	$52.11	$42.61 - $58.29
Q2 2022	120,000	$6,790	$59.39	$48.73 - $71.52
Q1 2022	24,000	$8,202	$62.17	$52.57 - $72.42
Q4 2021	26,500	$9,524	$65.81	$56.95 - $74.35
Q3 2021	26,500	$7,739	$57.90	$47.27 - $64.40
Q2 2021	26,500	$6,312	$42.69	$37.09 - $49.47
Q1 2021	26,900	$4,961	$32.72	$27.46 - $38.77
Q4 2020	27,400	$4,070	$25.28	$21.35 - $30.67
Q2 2020	29,000	$3,981	$25.11	$19.20 - $29.94
Q1 2020	29,000	$2,934	$21.43	$14.04 - $24.36
Q4 2019	28,800	$3,075	$18.82	$14.91 - $22.06
Q2 2019	41,300	$3,173	$16.47	$13.77 - $19.39
Q1 2019	41,870	$3,516	$15.94	$13.01 - $17.72
Q4 2018	42,870	$3,019	$15.23	$12.88 - $18.87
Q2 2018	44,400	$2,772	$11.84	$10.41 - $13.26
Q1 2018	44,700	$2,395	$9.74	$8.70 - $11.07
Q4 2017	51,700	$2,259	$8.15	$7.18 - $9.13
Q3 2017	52,000	$1,864	$7.59	$7.09 - $8.31
Q2 2017	52,000	$1,947	$7.75	$7.15 - $8.27
Q4 2016	51,900	$1,563	$6.25	$5.70 - $7.50
Q3 2016	74,600	$2,755	$6.99	$6.18 - $7.46
Q2 2016	75,600	$2,388	$6.48	$5.62 - $6.99
Q1 2016	75,600	$2,316	$5.52	$4.63 - $6.20
Q4 2015	74,800	$2,332	$7.18	$5.97 - $8.93
Q3 2015	72,300	$3,071	$8.85	$7.00 - $10.06
Q2 2015	76,400	$3,158	$7.77	$6.68 - $8.82
Q1 2015	84,100	$2,939	$6.53	$5.71 - $7.14
Q4 2014	82,200	$2,520	$5.39	$4.62 - $6.30
Q3 2014	82,200	$2,077	$5.05	$4.61 - $5.37
Q2 2014	82,200	$2,066	$4.48	$4.01 - $5.03
Q1 2014	45,000	$991	$4.37	$3.79 - $4.79
Q4 2013	15,000	$287	$3.90	$3.26 - $4.49